* src/usermod.c: Do not call usr_update() if it will have no

effects. This avoid checking if the user exists in the local passwd
	file if not necessary, and thus allow to add LDAP users to local
	groups. (The user is already checked against the system
	configuration with getpwnam()). Thanks to Dan Kopecek.

src/usermod.c

@@ -1649,7 +1649,10 @@ int main (int argc, char **argv)
 	 * change the home directory, then close and update the files.
 	 */
 	open_files ();
-	usr_update ();
+	if (   cflg || dflg || eflg || fflg || gflg || Lflg || lflg || pflg
+	    || sflg || uflg || Uflg) {
+		usr_update ();
+	}
 	if (Gflg || lflg) {
 		grp_update ();
 	}